Stump or rock extractor.



PATENTED JULY 18, 1905.

W. H. WRIGHT. STUMP 0R ROCK BXTRAGTOR.

APPLICATION FILED DEC. 16, 1904.

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UNITED STATES Patented July 18, 1905.

PATENT OEEICE.

STUMP OR ROCK EXTRACTOR.

SPECIFICATION forming part of Letters Patent No. 794,912, dated July 18,905.

Application filed December 16, 1904:. Serial No. 237,149.

To all whom, it may concern-.-

Be it known that I, WILLIAM HARRISON WRIGHT, a citizen of the UnitedStates, residing at Laconia, in the county of Bellmap and State of NewHampshire, have invented a new and useful Stump or Rock Extractor, ofwhich the following is a specification.

This invention relates to an improved stump and rock extractor, and hasfor its object the production of an inexpensive, durable, and eflicientdevice of this character capable of exerting a maximum lifting power'ata minimum expenditure of labor.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended, itbeing understood that various changes in form, proportions, and minordetails of construction may be resorted to without departing from theprinciple or sacrificing any of the advantages of this invention.

In the accompanying drawings, forming a part'of this specification,Figure 1 is a side elevation of a stump and rock extractor con structedin accordance with my invention. Fig. 2 is a side elevation of theoperating mechanism detached. Fig. 3 is a'similar view of the oppositeside of the same. Fig. 4 is a detail view of the supporting-bar. Fig. 5is an edge view of the same. Fig. 6 is a front elevation of thehandle-socket. Fig. 7 is a detail perspective view of the locking-pindetached. Fig. 8 is a detail perspective showing the manner of attachingthe spring to the end of the latch.

Similar numerals of reference indicate corresponding parts in all thefigures of the draw- 1ngs.

In carrying out the invention I employ a supporting-frame 5, preferablytriangular in shape, as shown, and to the apex of which is secured inany suitable manner a clevis 6, from which is suspended the liftingmechanism.

The lifting mechanism consists of a supporting-bar 7, one end of whichis provided with an opening for the reception of a link 8, which engagesthe clevis 6, the opposite end of said bar being recessed, as indicatedat 9, and provided with a longitudinally-disposed guiding-slot 10, inwhich is slidably mounted a rack-bar 11. The rack-bar 11 is adjustedvertically to raise or lower the load by means of a lever 12, the socket13 of which is bifurcated, as shown, and provided with alined openings14, adapted to receive a bolt 15, said socket being pivotally supportedon the bar 7 by means of oppositely-disposed depending links 16, one endof each of which is pivoted to said bar, as indicated at 17, and theopposite end thereof secured to the socket 13 by the bolt 15. The socket13 is provided with a terminal pin 17, adapted to engage the teeth 18 onthe rack-bar 11 when the lever 12 is depressed, that portion of the bar7 opposite the recess 9 being curved or bowed, as indicated at 19, so asto permit the socket 13 to be swung laterally, and thereby disengage thepin 17 from the teeth on the rack-bar in operating the.device. As ameans for looking the rack-bar preparatory to taking a new grip on thesame I provide a latch or lockingpin 20, slidably mounted on the lowerportion of the bar 7 and retained in position thereon by guiding-pins21. The latch 20 is provided with an intermediate web 22, adapted toengage the teeth on the rack-bar 11 when the free end of the lever is inthe elevated position, said 'web being forced into engagement with theteeth'by a preferably leafspring 23, secured to the bar 7 and engagingone end of the latch, as shown. On the oppositeside from the spring 23is pivoted a spring-lever 24, one arm 25 of which projects toward theend of the socket 13, while the opposite arm 25 hangs down by the latch20. When the spring-lever 24: is in the position shown by dotted linesin Fig. 2 of the drawings, it has no effect on the latch 20; but whenmoved into the position indicated by full lines, with the arm 25engaging the notch 26 in the latch, the lever 12 when depressed willengage the arm 25 and throw the latch out of engagement with the teeth,thereby permitting the rack-bar to be adjusted.

Secured to the lower end of the bar 11 is a ring or link 27, to which isfastened in any suitable manner one end of a chain, rope, or other cable28 for attachment to the stump, rock, or other article to be extracted.

In operation the rack-bar 11 is allowed to slip down as far as may benecessary to connect it with the stump or other object and the chain orcable made fast to the same. The lever 12 is now operated, so as tocause the pin 17 to engage the teeth on the rack-bar and raise said bar.As the rack-bar is raised each tooth pushes the latch laterally, andwhen the teeth pass the web 22 spring 23 forces said latch back intoengagement with the teeth, so as to hold said bar in the position towhich it is raised, while the lever 12 is operated to engage a toothlower down on the bar. When the rack-bar is lowered to take a new hold,the spring-lever 24 is arranged so-that the arm 25 will bear against theend of the latch, and when said lever is depressed theend of the socketWill engage the springarm 25, causing the arm 25 to engage the end ofthe latch and move the same laterally, thereby permitting the rack-barto drop to the position required.

Having thus described the invention, what is claimed is l. Thecombination with a supporting-bar havingone end thereof curved or bowed,of a rack-bar slidably mounted on the supportingbar, an operating-leverpivotally mounted on said bar and having its bifurcated end portionspanning the curved or bowed portion thereof, a'pin carried by the leverand adapted to engage the teeth on the rack-bar for adjustingthe latter,and a spring-pressed latch for lockingsaid rack-bar in adjustedposition.

2. The combination with a supporting-bar provided with a terminal recessand having a longitudinally-disposed guiding-slot communicatingtherewith one of the side walls of said recess being curved orbowed laterally, of a rack-bar slidably mounted in said guiding-slot, anoperating-lever pivotally mounted on the supporting-bar and having itsbifurcated end spanning the curved or bowed portionthereof, a pair oflinks, one end of each of which is pivoted to said supporting-bar, a pinor bolt forming a pivotal connection between the opposite ends of saidlinks and the operating-lever, a sliding latch mounted on thesupporting-bar and adapted to engage the rack-bar, a spring secured tothe supportingbar and engaging one end of the latch, and a spring-leverpivoted to said supporting-bar for engagement with the opposite end ofsaid latch and the operating-lever, respectively.

3. The combination with a supporting-bar provided with a terminal recessand having a longitudinally-disposed guiding-slot communicatingtherewith, one of the side Walls of said recess being curved or bowedlaterally, of a rack-bar slidably mounted in said guiding-slot, anoperating-lever pivotally mounted on the supporting-bar and having itsbifurcated end spanning the curved or bowed portion thereof, a pair oflinks, one end of each of which is pivoted to the supporting-bar, a pinor bolt forming a pivotal connection between the opposite ends of saidlinks and the operatingelever, a transverse shoulder formed on the endof the supporting-bar, laterally-projecting pins spaced from saidshoulders, a latch slidably mounted between the shoulder and theprojecting pins and adapted to engage the rack-bar, a spring secured tothe supportingbar and engaging one end of the latch, and a spring-leverpivoted to said supporting-bar for engagement with the opposite end ofsaid latch and theoperating-lever, respectively.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence'of two witnesses.

WILLIAM HARRISON WRIGHT.

Witnesses:

GEO. P. MUNSEY, O; J. GEORGE.

